Patents Assigned to ANT Corporation
  • Azeotropic distillation process for separating acetic acid, methylacetate and water in the production of an aromatic carboxylic acid
    Patent number: 7468456
    Abstract: An improved process for producing an aromatic carboxylic acid from an aromatic alkyl hydrocarbon is described, wherein the improvement comprises using the same aromatic alkyl hydrocarbon as the azeotropic agent for separation of acetic acid and methyl acetate from water via azeotropic distillation. The process of this invention has considerable advantages over other known processes, particularly in regards to consumption of the azeotropic agent and utilities, formation of undesirable impurities and operating costs.
    Type: Grant
    Filed: July 11, 2006
    Date of Patent: December 23, 2008
    Assignee: ANT Corporation
    Inventors: Myron Myonkee Lee, Duk-Jun Kwon, Dong-Won Lee, Alexander Jongwon Lee